patterns, cut triangles of cake, turning & fitting patterns, as necessary, to use all of cake. Take care to remove waxed paper from under cake. In large bowl with mixer at medium speed, beat butter, cream cheese & vanilla until light & fluffy. Gradually beat in confectioners' sugar; beat 5-7 minutes until thoroughly blended & smooth. Remove half of frosting & stir in green food coloring to desired shade. Using flexible metal spatula, spread frosting over top & sides of cake triangle, smoothing it on or swirling gently to resemble tree branches. Decorate cakes as desired with candies, colored sugars, assorted sprinkles & nonpareils. Using tip of small knife, gently hollow out small area in center of bottom edge of each tree; insert caramel roll or licorice sticks for trunks.